Water pressure and relief valve



Au 3, 1937. w. T. BIRCH WATER l RESSURE AND RELIEF V;ALvE

Origina1 F11ed March 4' 1935 Sul'e and without depriving the hot vvatersysten1 0f check valve protection 3' A unitary structure comprising a.casing housing a relief valve for connection to a hot water heatingsysteTn and a water pressu1'e regulator in fluid communication With Saidrelief valve and for conneotion to a water su ply systen1, a' i"rStcheck valve in Said casing nor!nally C10Sed. by and exposed t0 the hotwater under ressure of the heating systetn, a second check valve in saidcasing cooperable with Said 1rst check valve and norInally shielded bysaid rSt check valve against hot vvater under pressure,

n1eans in sai(l casing dening ai sh0f G0nduit for vvater between saidf]1'st and said second check valves and provided with a thin wll sectionadapted to co01 water leaking from said iirst check valve, a plugthreaded in said casing to carry said second check valve and entenng aside opening of said conduit, said plug being arranged renlovable fr0Inthe side opening of Said conduit for the insertion of a tool to reInovesedirnent about said iirst check valve, and said short condu t beingfornled to permit the ready insertion of the tool.

